/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.yarn.api.records.impl.pb;

import org.apache.hadoop.yarn.api.records.EnhancedHeadroom;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.EnhancedHeadroomProto;
import org.apache.hadoop.yarn.proto.YarnServiceProtos.EnhancedHeadroomProtoOrBuilder;

import org.apache.hadoop.thirdparty.protobuf.TextFormat;

public class EnhancedHeadroomPBImpl extends EnhancedHeadroom {

  private EnhancedHeadroomProto proto =
      EnhancedHeadroomProto.getDefaultInstance();
  private EnhancedHeadroomProto.Builder builder = null;
  private boolean viaProto = false;

  public EnhancedHeadroomPBImpl() {
    builder = EnhancedHeadroomProto.newBuilder();
  }

  public EnhancedHeadroomPBImpl(EnhancedHeadroomProto proto) {
    this.proto = proto;
    viaProto = true;
  }

  public EnhancedHeadroomProto getProto() {
    mergeLocalToProto();
    proto = viaProto ? proto : builder.build();
    viaProto = true;
    return proto;
  }

  @Override
  public int hashCode() {
    return getProto().hashCode();
  }

  @Override
  public boolean equals(Object other) {
    if (other == null) {
      return false;
    }
    if (other.getClass().isAssignableFrom(this.getClass())) {
      return this.getProto().equals(this.getClass().cast(other).getProto());
    }
    return false;
  }

  @Override
  public String toString() {
    return TextFormat.shortDebugString(getProto());
  }

  private void mergeLocalToBuilder() {
    // No local content yet
  }

  private void mergeLocalToProto() {
    if (viaProto) {
      maybeInitBuilder();
    }
    mergeLocalToBuilder();
    proto = builder.build();
    viaProto = true;
  }

  private void maybeInitBuilder() {
    if (viaProto || builder == null) {
      builder = EnhancedHeadroomProto.newBuilder(proto);
    }
    viaProto = false;
  }

  @Override
  public void setTotalPendingCount(int totalPendingCount) {
    maybeInitBuilder();
    if (totalPendingCount == 0) {
      builder.clearTotalPendingCount();
      return;
    }
    builder.setTotalPendingCount(totalPendingCount);
  }

  @Override
  public int getTotalPendingCount() {
    EnhancedHeadroomProtoOrBuilder p = viaProto ? proto : builder;
    return (p.hasTotalPendingCount()) ? p.getTotalPendingCount() : 0;
  }

  @Override
  public void setTotalActiveCores(int totalActiveCores) {
    maybeInitBuilder();
    if (totalActiveCores == 0) {
      builder.clearTotalActiveCores();
      return;
    }
    builder.setTotalActiveCores(totalActiveCores);
  }

  @Override
  public int getTotalActiveCores() {
    EnhancedHeadroomProtoOrBuilder p = viaProto ? proto : builder;
    return (p.hasTotalActiveCores()) ? p.getTotalActiveCores() : 0;
  }

}
